Abstract A container is disclosed with a valve opening at its bottom wall to permit steam to circulate into the container and to permit any condensation to drain from the container while the valve is open. The valve is closed by an expandable chamber in response to the pressure drop at the end of a sterilizing cycle. A valve controlling the flow of steam into the expandable chamber closes when subjected to the high temperature steam, thus capturing steam within the chamber. This steam expands when the pressure drops to close the valve in the container. The container lid and gasket permit steam to be withdrawn from the container but prevent air flow into the container. A vacuum created in the container at the end of the sterilizing cycle holds the container lid in place and holds the valve closed. Also disclosed is a bimetallic spring valve which opens when steam is applied to a container and closes when the temperature drops as steaming ceases. The valve is biased closed at reduced temperature but opens when a vacuum is applied to the container exterior, thus permitting water vapor to be withdrawn.
Apparatus for containing items while being sterilized or stored comprising: means defining a container; means in a wall of the container for permitting access to the container interior; and means responsive to a sterilizing environment applied to the container interior and exterior to close said container access means after its contents have been sterilized to prevent further environment from entering the container after sterilization, said container being constructed so that further environment cannot enter the container after said access means is closed; said responsive means including pressure responsive means for permitting said sterilizing environment to escape from said container when the gaseous pressure in the container exceeds the pressure outside the container a slight amount; said means responsive to the sterilizing environment including a temperature responsive valve which closes automatically after said items have been subjected to a sterilizing temperature long enough to sterilize said items, and said valve being also constructed to serve as a pressure responsive check valve and form the means for permitting said environment to escape from the container.
Claim 2
Dependent Claim
173 words
Apparatus for containing items while being sterilized or stored comprising: means defining a container; means in a wall of the container for permitting access to the container interior; and means responsive to a sterilizing environment applied to the container interior and exterior to close said container access means after its contents have been sterilized to prevent further environment from entering the container after sterilization, said container being constructed so that further environment cannot enter the container after said access means is closed; said responsive means including pressure responsive means for permitting said sterilizing environment to escape from said container when the gaseous pressure in the container exceeds the pressure outside the container a slight amount; said means responsive to the sterilizing environment including a temperature responsive valve which closes automatically after said items have been subjected to a sterilizing temperature long enough to sterilize said items, and said valve being also constructed to serve as a pressure responsive check valve and form the means for permitting said environment to escape from the container.